Function AppendStringKeyValue

src/base/strings/string_split.cc:104–131

}

bool AppendStringKeyValue(StringPiece input,
                          char delimiter,
                          StringPairs* result) {
  // Always append a new item regardless of success (it might be empty). The
  // below code will copy the strings directly into the result pair.
  result->resize(result->size() + 1);
  auto& result_pair = result->back();

  // Find the delimiter.
  size_t end_key_pos = input.find_first_of(delimiter);
  if (end_key_pos == std::string::npos) {
    DVLOG(1) << "cannot find delimiter in: " << input;
    return false;    // No delimiter.
  }
  input.substr(0, end_key_pos).CopyToString(&result_pair.first);

  // Find the value string.
  StringPiece remains = input.substr(end_key_pos, input.size() - end_key_pos);
  size_t begin_value_pos = remains.find_first_not_of(delimiter);
  if (begin_value_pos == StringPiece::npos) {
    DVLOG(1) << "cannot parse value from input: " << input;
    return false;   // No value.
  }
  remains.substr(begin_value_pos, remains.size() - begin_value_pos)
      .CopyToString(&result_pair.second);

  return true;
}

template <typename Str, typename OutputStringType>
void SplitStringUsingSubstrT(BasicStringPiece<Str> input,